diff options
| -rw-r--r-- | lldb/source/Plugins/ABI/SysV-x86_64/ABISysV_x86_64.cpp | 57 |
1 files changed, 11 insertions, 46 deletions
diff --git a/lldb/source/Plugins/ABI/SysV-x86_64/ABISysV_x86_64.cpp b/lldb/source/Plugins/ABI/SysV-x86_64/ABISysV_x86_64.cpp index 10bbae56649..5c8230193b9 100644 --- a/lldb/source/Plugins/ABI/SysV-x86_64/ABISysV_x86_64.cpp +++ b/lldb/source/Plugins/ABI/SysV-x86_64/ABISysV_x86_64.cpp @@ -13,6 +13,7 @@ // C++ Includes // Other libraries and framework includes #include "llvm/ADT/STLExtras.h" +#include "llvm/ADT/StringSwitch.h" #include "llvm/ADT/Triple.h" // Project includes @@ -1908,52 +1909,16 @@ bool ABISysV_x86_64::RegisterIsVolatile(const RegisterInfo *reg_info) { // It's being revised & updated at https://github.com/hjl-tools/x86-psABI/ bool ABISysV_x86_64::RegisterIsCalleeSaved(const RegisterInfo *reg_info) { - if (reg_info) { - // Preserved registers are : - // rbx, rsp, rbp, r12, r13, r14, r15 - // mxcsr (partially preserved) - // x87 control word - - const char *name = reg_info->name; - if (name[0] == 'r') { - switch (name[1]) { - case '1': // r12, r13, r14, r15 - if (name[2] >= '2' && name[2] <= '5') - return name[3] == '\0'; - break; - - default: - break; - } - } - - // Accept shorter-variant versions, rbx/ebx, rip/ eip, etc. - if (name[0] == 'r' || name[0] == 'e') { - switch (name[1]) { - case 'b': // rbp, rbx - if (name[2] == 'p' || name[2] == 'x') - return name[3] == '\0'; - break; - - case 'i': // rip - if (name[2] == 'p') - return name[3] == '\0'; - break; - - case 's': // rsp - if (name[2] == 'p') - return name[3] == '\0'; - break; - } - } - if (name[0] == 's' && name[1] == 'p' && name[2] == '\0') // sp - return true; - if (name[0] == 'f' && name[1] == 'p' && name[2] == '\0') // fp - return true; - if (name[0] == 'p' && name[1] == 'c' && name[2] == '\0') // pc - return true; - } - return false; + if (!reg_info) + return false; + assert(reg_info->name != nullptr && "unnamed register?"); + std::string Name = std::string(reg_info->name); + bool IsCalleeSaved = + llvm::StringSwitch<bool>(Name) + .Cases("r12", "r13", "r14", "r15", "rbp", "ebp", "rbx", "ebx", true) + .Cases("rip", "eip", "rsp", "esp", "sp", "fp", "pc", true) + .Default(false); + return IsCalleeSaved; } void ABISysV_x86_64::Initialize() { |
